INFO VISUALIZATION: I don't know enough about biology to say what this model does exactly, but I found this visualization of a busy neuron to be very interesting.

Here is some info from the NSF:

The model is a new approach to look at percolation—the flow of a liquid or small particle through a porous material. In the simulation, materials pass through fields of complex, three-dimensional shapes, a scenario that is closer to real-world environments than existing two-dimensional models and models incorporating simpler shapes.

[...]

In addition to biological applications, the simulation will help researchers develop new materials by revealing better ways to craft porous substances. By understanding the properties of these types of materials, researchers can enhance conductivity in batteries, flow paths in filters and numerous other percolation mechanisms.